Creep Monitoring for Subway Station Structure by Fiber Bragg Grating Sensors

Using the double-power law for concrete creep, the strain of septi-slab is calculated. Experiment data measured by fiber Bragg grating sensors agree well with the calculated results, and the calculated results taking into account the earlyage creep are better in agreement with the measured data. Creep has very important effects on earlyage concrete, and the creep of earlyage concrete should be considered in the structural design and crack control. Based on the B3 model for concrete creep, the longterm creep of new impervious concrete structures is analyzed. The data measured by the sensors agree well with the data computed with B3 model.